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18

You are to construct an x-bar chart such that the control limits would include 98% of the sample means, where the random samples would be of size 5; this it say that type 1 error would occur with 2 % probability. The process standard deviation is known to be 3.2. The following data is used to construct the control chart. You are to calculate the UCL only. Round your answer to TWO places of decimal. Sample # 1 2 3 4 obs 1 17 16 13 18 17 obs 2 16 17 20 18 15 obs 3 17 15 11 12 15 obs 4 10 10 12 20 10 obs 5 17 20 20 18 15 5 The same data is available in the Excel file link given below. -x-bar-1-3.xlsx Sample # 1 obs 4 Jobs 3 17 10 obs 1 17 16 13 18 17 Jobs 2 16 17 20 2. 15 10 3 obs 5 17 20 20 18 15 12 4 18 15 11 12 15 5 20 10